Title:
METHOD FOR PRODUCING HIGHLY PURE VINYL PYRROLIDONE POLYMER
Document Type and Number:
Japanese Patent JP2001354723
Kind Code:
A
Abstract:
To provide a method for producing a highly pure vinyl pyrrolidone polymer which can dissolve in an organic solvent to form a transparent solution.
Vinyl pyrrolidone is polymerized in the presence of a redox catalyst containing an organic peroxide and a bisulfite, and the obtained polymer is purified by contact with an anion exchange resin.
Inventors:
KITADA AKIRA
FUJISE KEIICHI
HAMAGUCHI ITSUKO
FUJISE KEIICHI
HAMAGUCHI ITSUKO
Application Number:
JP2000180310A
Publication Date:
December 25, 2001
Filing Date:
June 15, 2000
Export Citation:
Assignee:
DAI ICHI KOGYO SEIYAKU CO LTD
International Classes:
C08F6/00; C08F6/02; C08F6/06; C08F4/40; C08F26/10; (IPC1-7): C08F26/10; C08F4/40; C08F6/06
Attorney, Agent or Firm:
Sota Asahina (1 person outside)
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